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Technique for extracting low phenanthrene and anthracene oil from distillation of coal oil and anthracene oil

A technology of coal tar and low phenanthrene, applied in the field of extracting intermediates, can solve the problems of long total reaction time, product quality needs to be improved, and low processing capacity

Active Publication Date: 2008-02-27
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the original process still has defects such as long total reaction time, low processing capacity, and product quality that still needs to be improved.

Method used

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  • Technique for extracting low phenanthrene and anthracene oil from distillation of coal oil and anthracene oil
  • Technique for extracting low phenanthrene and anthracene oil from distillation of coal oil and anthracene oil

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Embodiment Construction

[0038] According to the process disclosed in the "Summary of the Invention" of the present invention, the process and the equipment used are described in detail below:

[0039] First, please refer to Figure 1. The raw material - coal tar anthracene oil fraction A and solvent B with high xylene content are prepared in a certain proportion to form a mixed solution in a sealed crystallization container. After eight stacking crystallizations and two cold washing , four times of hot washing, and one melting of the four major processes. All the extracted low-phenanthrene oils are in a molten state, and are discharged from the crystallizer into the final product storage tank through pipelines. %; the carbazole content is 4-8%; the phenanthrene content is 0.3-1%; the total extraction process time is 60.5-75.5 hours; the processing capacity of anthracene oil fraction is 5.0-5.2 tons / hour.

[0040] The above-mentioned solvent B is a special solvent disclosed in the patent application n...

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Abstract

The invention discloses an extracting technology of low phenanthrene anthracene oil from coal-tar oil distillate, which comprises the following steps: allocating coal-tar anthracene oil A and high content dimethylbenzene dissolvent B into miscible liquids proportionally in crystallizing container; extracting the low phenanthrene anthracene oil through stockpile crystallization, cold washing, hot washing, melting sequentially. In comparison with the traditional technology, the invention is characterized by the following: lowing content of the phenanthrene to improve the introduction quality; reducing cooling load capacity of the crystallizing container and saving time by using high low tow-phase diaphoresis action; reducing the damage of anthracene and carbazoles; enhancing enriched quantity of the anthracene and the carbazoles; dislodging the phenanthrene in the crystallization by increasing balance time of cold washing and temperature control; dissolving easier through increasing four scouring procedures step by step to dislodge the phenanthrene in the crystallization to high degree and save the total needing time.

Description

technical field [0001] The present invention relates to the extraction of intermediates from coal tar anthracene oil fractions, more specifically a process for extracting low phenanthrene oil from coal tar anthracene oil fractions, which mainly removes Phenanthrene, enriched anthracene, carbazole. Background technique [0002] Low phenanthrene oil is a kind of mixed oil with anthracene and carbazole as the main components obtained by means of crystallization and dissolution, and the phenanthrene content is less than 1-2%. , the anthracene content is higher than 10-12%, and the carbazole content is higher than 3-4%. The oil can be further prepared into crude anthracene with low phenanthrene content, and can also directly refine high-purity anthracene and carbazole respectively. It can be seen from the above that the low-phenanthrene oil is not a composition obtained by chemical synthesis, but an intermediate extract between the final product phenanthrene, anthracene and carb...

Claims

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Application Information

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IPC IPC(8): C07C15/28C07C15/27C07C7/04
Inventor 袁康入顾镇钧张金涛陈建申翁爱民
Owner BAOSHAN IRON & STEEL CO LTD
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